Roller



F, HOFFMANN March'22, v

* l ROLLER filed Nov`. 11 f 193e Fm'z Hoffmann INVENTOR HIS ATTORNEY Patented Mar. 22, 193s 2,112,095

` UNITED STATES PATENT. OFFICE ROLLER Fraz Hmmm, Loaz, Poland Application November 11, 1936, Serial No. 110,287

In Germany November 15, 1935 i s claims. `(Cl. 19-143) The present invention relates to-Jollexs, `more vantage if the layer is not too,thlck-, as otherwise particularly rollers of the kind used in spinning the elasticity is impaired. Preferably, a seamless mills for working up libre prior to spinning or cellulose cover is used. When the vcover is worntwisting. out, it can be re-ground.

It is known in spinning mills to pass the fibres The manufacture of the described' roller is besf 5l l,prior to spinning or twisting through several carried out by slipping an annular body of repairs of rollers rotating with dilerent speeds, for generated celulose or a similar celluloslc mass the purpose of stretching, smoothing or othercapable of swelling in water, containing a lling wise treating them. Generally, one of the rollof cork or the other mentioned materials, in the ers oleach pair of 'rollers is driven, whilst the swollen condition upon a cylinder or a roller of 10 other is carried by friction. As a rule the latrigid material and allowing -it to shrink on by ter roller is positioned above the llrst. i drying. The manufacture of the .cellulose body One object of the invention is a roller which is is effected in a manner known per se in the well suitable for such devices, more particularly, manufacture of cellulose tubes or the like for l5 as upper roller. The new roller is distinguished example by spinning cellulose solutions from 15 by particular surface properties which are of imannular nozzles into precipitation baths or by portance for its technical application. In the rst covering viormers with cellulose solution and by instance, a slight roughness of the surface, as treating the obtained bodies in precipitation well as elasticity of the surface are of imporbaths or allowing the solvent to evaporate from tance. them. It is best to start from viscose mixed 20 Further features of the invention will appear with cork iiour. from the following description. Fig. 3 shows a complete drawing set, which The invention is illustrated in the accompanyconsistsof the feeding device 4, the deliverydeing drawing,Y in which: vice 5 and the draw passage comprising the upper Fig. 1 is a front view, partly in section and rollers 'l and the lower rollers 8. S designates Fig. 2 a side view of the new roller in section, the libre to be drawn. In the illustrated device Fig. 3 shows a complete drawing set in which the upper rollers 'l are constructed according the rollers illustrated in Figs. 1 and 2 are emto Figs. 1 and 2. ployed. I claim: n@ 1n the drawing l isa core ci rigid and solid 1. A textilefibre drawing roll characterized material, for instance metal, particularly iron. ,thereby that the material forming its curved Upon this core there is stuck-on layer 2, surface' consists of a non-iibrous diillcultly ignit-v which preierably consists of felt. Upon this felt ible cellulosic mass which encloses a llnely dilayer there is a further layer 3 which consists of vided elastic material. a cellulose film, i. e. a tough, dense, non-fibrous 2. A textile-fibre drawing roll comprising a 35 and elastic cellulosic mass. Regenerated cellurigid core and a covering oa nonfibrous dimlose is particularly suitable; but diilicultly ignitcultly ignitible cellulosic mass which encloses ible cellulose esters, for instance partially saponismall grains of an elastic material. ed cellulose esters, or cellulose ethers may be 3. A textile-nbre drawing roll comprising a 40 used instead. In the cellulose lm, grains, flcovering lm consisting of a mass selected from '40 bres or other ne particles of an elastic material, the group consisting of cellulose hydrate, cellufor instance, cork iiour particles, are embedded.- lose ester and difficultly ignitible cellulose ether Instead of cork our, for instance leather flour, which illm encloses a iinely divided elastic matewood ilour, iine wood fibres and the like may be rial. used. 'I'nese lnely divided bodies may constitute 4. A textile fibre-drawing roll comprising a 45 about 5%, 10% or 20% ofV the cellulosic mass. rigid core and a covering consisting of a mass se- These numbers are only mentioned by way of lected from the group consisting of cellulose hyexampde. if desired, the content may, for indrate, diiicultly ignitible cellulose ester and celstance, bc suitable choice of the lulose ether which lm encloses cork ilour. iineness oi granulation and the quantity added, 5. Ak roller comprising a rigid core and a cov- 50 it is possible to give the coat any desired degree ering of cellulose hydrate, which covering enof resiliency and surface roughness. The thickcloses cork flour. ness of the cellulosic mass may, for instance be 6. A roller comprising e. metal core andlon this A mm., 1/2 mm. or l mm., but may, if desired, be metal core a seamless cellulose hydrate covering, greater or even somewhat smaller. It is an ad the covering containing cork our. 55

Cil

Patent No.J 2,112,095.

7. A roller comprising a. metal core, a. felt driven roller and a. non-driven roller which layer on this metal core and a seamless cellulose latter coacts with the driven roller by friction, hydrate covering on the said felt 1a.yer,'the celluthe non-driven roller comprising a covering of lose hydrate covering containing cork flour. cellulose hydrate which covering encloses cork 8. A drawing set for spinning mills comprising our. several pairs of rollers, each pair consisting of a. FRITZ HOFFMANN.

CERTIFICATE 0F CORRECTION.

y i March 22., 1958. FRITZ HOFFMANN.

It is hereby certified that error appears in`the printed specification of the above nnmbered patent requiring correction as follows: Page 1, second column, line )42, claim 5, strike out thewords "difficultly ignitible" arri I insert the same before the syllable "cellu" at the end. of line lil, saine claim; and that they said Letters Patent shouldbe reed with this correction therein that the same may conform tothe record of the case in the Patent Office.

signed and sealed this 23th day of June, A. D. 1958.

Henry Van Arsdale,

V(Seal)l l l Acting Commissioner of Patents.

Patent No.J 2,112,095.

7. A roller comprising a. metal core, a. felt driven roller and a. non-driven roller which layer on this metal core and a seamless cellulose latter coacts with the driven roller by friction, hydrate covering on the said felt 1a.yer,'the celluthe non-driven roller comprising a covering of lose hydrate covering containing cork flour. cellulose hydrate which covering encloses cork 8. A drawing set for spinning mills comprising our. several pairs of rollers, each pair consisting of a. FRITZ HOFFMANN.

CERTIFICATE 0F CORRECTION.

y i March 22., 1958. FRITZ HOFFMANN.

It is hereby certified that error appears in`the printed specification of the above nnmbered patent requiring correction as follows: Page 1, second column, line )42, claim 5, strike out thewords "difficultly ignitible" arri I insert the same before the syllable "cellu" at the end. of line lil, saine claim; and that they said Letters Patent shouldbe reed with this correction therein that the same may conform tothe record of the case in the Patent Office.

signed and sealed this 23th day of June, A. D. 1958.

Henry Van Arsdale,

V(Seal)l l l Acting Commissioner of Patents. 

